I just bought a used 2005 caravan. It ran great the first few days then I took it on an extended drive. I stopped on the way home to pick up pizza and while there it died twice . Engine light came on and on the drive home it lost power going up hill but ran fine downhill or on a gentle throttle. Next day engine light was off. Came back on a day later had it checked for codes, throwing a p0300, p0325, p0330 and a p335 and a p1648( which I think just says battery unplugged recently. Any suggestions please help.

 

Did you pop the hood and look for any visible problems? If so, what did you see?

Someone posted a similar problem for a different car:

"P0300 - Multiple Cylinder Misfire
"Same problem here with the p0300 after a couple of hours under the hood I find a Coolant leak right on top of # 4 coil after clean and dry my eng is back to normal
I think I was lucky"